Drill-bit sharpener.



No. 682,565. Patented sept. lo, |901.` w. ovins.

DRILL BIT SHABPENEB.

(Application med mar. 2e, 1901.) (N o M o d e l.)

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YH: MORRIS PETERS co. Puoraumo., wAsHmcToN. u. c.

UNITED STATES PATENT OFFICE.

WELLINGTON OVENS, OF SILVERTON, COLORADO.

DRILL-BIT SHARPEN ER.

SPECIFICATION forming part of Letters Patent No. 682,565, datedSeptember 10, 1901. Application tiled March 23,1901. Serial No. 53,353.(No model.)

To o/.ZZ whom t may concern: l Be it known that I, WELLINGTON OvENs, acitizen of the United States of America, residing at Silverton, in thecounty of San Juan and State of Colorado, have invented certain new anduseful Improvements in Drill-Bit Sharpeners; and I do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the ligures of reference marked thereon, which form a part ofthis specification.

My invention relates to improvements in vmeans for sharpening drill-bitsor tools; and

it consists of the features, arrangements, and combinations hereinafterdescribed and claimed, all of which will be fully understood byreference to the accompanying drawings, in which is illustrated anembodiment thereof.

In the drawings, Figure 1 is a top or plan view of the lower part of myimproved apparatus. Fig. 2 is a section taken through the completemachine on the line x oo, Fig. 1, a part being shown in elevation.fragmentary top View ofthe device for clam'ping and holding the upperportion of the drillbit during the sharpening operation. Fig. t is afragmentary detail view of the adjustable holder for the bit. Fig. 5 isa section taken on the line y y, Fig. 2. Fig. 6 is a section taken onthe line ,e z, Fig. 2.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate a casing, preferably composed of two members5, connected by transverse bolts 6, secured to a base 7 by verticalbolts 8. Within a chamber formed in this casin g are located twocooperating dies 9 and 10. .These dies are slidable vertically in thecasing, whereby they may be removed at will when for any reason it maybecome necessary. Normally or during the drillsharpening operation thedies have no vertical movement. The two die members when in position foruse, as shown in Fig. 2, inclose a vertical cavity 1l, whose upperportion is shaped to fit the shank of the drill-bit and whose lowerextremity is shaped to conform to the shape of the cutting extremity ofFig. 3 is a the drill-bit to be sharpened. The die member 10 is movablehorizontally, whereby the cavity 11 `is made to conform to the size ofthe drill-bit and confine it closely in place. To this end the member 1Uis provided with a dovetail tongue 10a, engaging a counterpart grooveformed in a block 12, having inclined side tongues 12a, engagingcounterpart grooves formed in the side walls of the casing. This block12 is connected by means of a link 13 with a shaft 14, provided with acrank 15, whereby as the shaft is turned the block 12, together with thedie, is moved back and forth at will. The block 12 as it moves backwardrises with the link 13, while the die member l0 moves backward in ahorizontal plane, since the block is vertically slidable on the die, andthe latter is normally locked against vertical movement by the top plate16, having an opening laabove the cavity 11 and provided with aleaf-spring 16, having a depending stud 16d engaging a recess formed inthe casing below. This stud passes through the spring and terminates ina knob above for convenience of adjustment. The plate 16 is providedwith side tongues engaging grooves formed in the adjacent sides of thecasing and is located directly above the parts 10 and 12, whereby theyare locked against vertical movement. To the base of the casing or othersuitable stationary support is made fast an upright part 17, in which isslidable vertically a plate 18, provided with toothed dogs 19, normallypressed outwardly by leaf-springs 20 to engage teeth 17a, formed onopposite sides of the part 17 and in front of `vertical ways in whichthe plate 18 slides. Mounted on the plate 18 and projecting therefrom atright angles is a platform 21, upon which is adjustably mounted abed-plate 22 by means of bolts 3, fast on the plate and passing throughslots 21, formed in the platform.

Y Upon the upper surface of the plate 22 are pivotally mounted, as shownat 23, two clamping members 24, whose outer 'extremities are recessed,as shown at 25, so that when closed they will grasp the upper portion ofthe drillbit and hold it securely in place. These clamping members areopened and closed through lthe instrumentality of a slidable plate 26,held in place by two overlapping side strips 27. This plate 26 isprovided with an upward projection 29 for use in movingit back andforth, according as it becomes necessary to open or close the clampingmembers 24. The plate 26 is provided with side pieces 29a, one beinglocated on each side of the clamping members and constructed andarranged to close said members as the plate is moved forward or towardthe right, referring to Figs. 2 and 3. When closed, as shown in Fig. 3,there is a narrow space 30 between the clamping members. The forwardportion of this space is of sufficient width to receive a dependingprojection 31, fast on the plate 2G. This space, however, diminishes inwidth toward the rear, whereby as the plate 26 is moved rearwardly ortoward the left, referring to Figs. 2 and 3, the projection 31 opens thejaws of the clamping members and releases the drill-bit. The jaws wherethey are recessed to form the opening 25 are preferably lined withrubber or other suitable material, whereby they adapt themselves to theshape of the drill-bit shank and grip it tightly when adjusted for thepurpose. When the parts are properly adjusted, the opening 25 isdirectly above the socket 11, which receives the lower extremity of thedrill-bit or tool as aforesaid. The horizontal platform 21 is adjustablevertically on the standard 17 to conform to the length of the drill-bitby moving the plate 1S. As this plate is moved upwardly the dogs yieldautomatically as they engage the ratchet-teeth 17a on each side and slipover the said teeth. However, in order to move the plate downwardly thedogs must be pressed inwardly against the springs 2O until they arereleased by the ratchet-teeth. For this purpose a recess 19L is formedin each dog to facilitate the aforesaid action.

Vhen the apparatus is in use, the drill-bit occupies the position shownby dotted lines in Fig. 2. The bit is sharpened by striking its upperextremity with a hammer or other suitable instrument, and the force thusexerted causes the lower extremity of the bit to conform to the shape ofthe socket in which it is located. As the socket is the counterpart of asharp drill-bit, the tool is quickly sharpened by the operationdescribed. With short drill-bits the devices for supporting the upperextremity of the drill-bit shank need not be employed. Vith longer bits,however, this yfeature will be found extremely advantageous, since inorder to properly sharpen the lower extremity of the bit the shank mustbe held in a uniform vertical position. The block 12 is adjusted bymeans of a lever-arm 32, (see Fig. 1,) made fast to the outer extremityof the crank-shaft 14.

Having thus described my invention, what I claim is 1. The combinationwith a casing, of two die members located therein, and recessed to forma socket for the lower extremity of the tool to be sharpened, one of thesaid members being movable, and suitable means applied to the movablemember, for closely coniining the drill-bit in the adjustable socket.

2. In a sharpener for drill-bits and similar tools, the combination witha suitable casing, of two dies recessed to form a socket for theextremity of the tool to be sharpened, one of the dies being movable, ablockconnected with the movable die to have a vertical movement on thelatter, the casing having guides for the block whereby it hasa diagonalmovement, and suitable means for actuating the said block for thepurpose of manipulating the movable die.

3. The combination of two dies recessed to form a socket for the cuttingextremity of the tool to be sharpened, one of said dies being movable, ablock connected with said movable die, and arranged to move verticallyas it moves the die horizontally, a crank-shaft,

and a link connecting the block with the crank-shaft.

4. In a drill-bit Sharpener, the combination with a casing of twocoperating detachable dies, recessed to form a sharpening-socket for thedrill-bit, one of the dies being movable to vary the size of the socketwhereby it is made to accommodate bits of different sizes, an adjustableplate located above the dies to hold them in place during use, saidplate being apertured above the sharpening-socket.

5. In a drill-bit Sharpener, the combination of two dies inclosin g asharpening-socket,- one die being movable, adapted to receive thecutting extremity of the bit, and means located directly above thesharpening-socket forholding the upper portion of the drill-bit duringthe sharpening operation.

6. In a drill-bit Sharpener, the combination with clamping meansprovided with a sharpening cavity, of a standard, a vertically-adjustable platform mounted on the standard, and an adjustable devicecarried by the platform and adapted to clamp the upper portion of thedrill-bit shank when its cutting extremity is in the sharpening cavity.

7. In a drill-bit Sharpener, the combination with clamping meansprovided with a sharpening cavity, of a standard, avertically-adjustable platform mounted on the standard, a platehorizontally adjustable on the platform, and aclamping device mounted onthe plate above the sharpening cavity.

8. In a drill-bit Sharpener, the combination with bit-confining meansprovided with a sharpening cavity, of a standard, a verticallyadjustableplatform mounted on the standard, an adjustable device carried by theplatform and adapted to clamp the upper portion of the drill-bit shankwhen its cutting extremity is in the sharpening cavity, the said devicecomprising a slidable plate, two clamping members embraced by the plateon opposite sides and normally separated by a narrow loo IGS

IIS

689,565 f t a Space, the p'ate beting piovide with a de- In testimonyWheeof Iaf'flx my signature pending projection adapted to separate thein presence of two witnesses. members as the plate is moved in onedirection, while the plate embraces the clamping WELLINGTON OVENS` 5members from the sides and closes the mexn- Witnesses:

bers when the plate is moved in thel opposite DORA C. SHICK,

direction. v MARY C. LAMB.

